Synthetic studies on antifungal cyclic peptides, echinocandins. Stereoselective total synthesis of echinocandin D via a novel peptide coupling
作者:Natsuko Kurokawa、Yasufumi Ohfune
DOI:10.1016/s0040-4020(01)87959-x
日期:1993.7
Synthetic studies on the novel fungicidal oligopeptides, echinocandins (1b and 1c), are described. The constituent amino acids 5–8 were synthesized in a stereocontrolled manner from the chiral starting materials, 5a, 6a and 7a, respectively. The coupling of these amino acids was characterized by the use of unprotected amino acid as the C-terminal and 2-pyridyl thiol ester as the N-terminal, and the
描述了新型杀菌肽,棘球chin素(1b和1c)的合成研究。组成氨基酸5-8是分别从手性原料5a,6a和7a以立体控制方式合成的。这些氨基酸的偶联的特征在于,使用未保护的氨基酸作为C端,使用2-吡啶硫醇酯作为N端,偶联是在1-(三甲基甲硅烷基)咪唑(TMSIm)存在的情况下进行的。或催化量的叔胺,分别得到C端游离二肽14和16a,它们被转化为五肽17a,是合成1b和1c的常用中间体。1c的合成是通过六肽24b的环化实现的。